Support managed downloads of 3.13t (no-gil / freethreaded)

[zanieb]

Right now, we only support a single build per CPython version. We need to add support for other build options to allow installing the freethreaded builds. This will require changes to our download metadata fetch and template scripts. We should probably aim support debug builds too.

[Crypto-Spartan]

In addition, I'd love it if uv were able to support other builds from python-build-standalone, such as x86_64-unknown-linux-gnu-pgo+lto-full.tar.zst, x86_64_v3-unknown-linux-gnu-install_only_stripped.tar.gz, etc.

I know we talked about this in the other issue, just wanted to add the request here specifically.

[charliermarsh]

Can I ask why you need / want to use those other builds?

[Crypto-Spartan]

Those other builds provide optimizations done by the compiler that aren't done in the base -install_only_stripped.tar.gz builds. I just chose those 2 as examples, but I believe uv should support any build from python-build-standalone.

[charliermarsh]

The install-only-stripped builds include PGO and LTO.

[Crypto-Spartan]

Ah, I didn't realize that. when I checked the docs at https://gregoryszorc.com/docs/python-build-standalone/main/running.html#obtaining-distributions, it didn't seem that way. I found https://gregoryszorc.com/docs/python-build-standalone/main/distributions.html#install-only-archive had it listed, all the way at the bottom of the page.

[Crypto-Spartan]

What about the newer CPU architectures such as x86_64_v3?

[zanieb]

What about the newer CPU architectures such as x86_64_v3?

Yes, those also prefer the optimized builds.

[Crypto-Spartan]

I figured that. I was trying to ask:
Is uv open to supporting installing builds with newer CPU architectures such as x86_64_v3? I didn't see any of those builds listed in https://github.com/astral-sh/uv/blob/f6fd849f2c63e3b319ab03c936beab866dc303ba/crates/uv-python/download-metadata.json

[zanieb]

We should chat about that in another issue as it's totally unrelated to this thread — but, yes? If we can detect the architecture reliably.

[zanieb]

I actually had already opened an issue to track this at #7193